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FILE - In this Sept. 29, 2012 file photo, guitarist Dan Auerbach, center, and drummer Patrick Carney of The Black Keys perform at the Global Citizen Festival in Central Park, in New York. The Black Keys are remaining vigilant when it comes to sound-a-like songs. The Nashville duo is suing Pinnacle Entertainment in New York federal court. (AP Photo by Evan Agostini/Invision/AP, File)

FILE - In this Sept. 29, 2012 file photo, guitarist Dan Auerbach, center, and drummer Patrick Carney of The Black Keys perform at the Global Citizen Festival in Central Park, in New York. The Black Keys are remaining vigilant when it comes to sound-a-like songs. The Nashville duo is suing Pinnacle Entertainment in New York federal court. (AP Photo by Evan Agostini/Invision/AP, File)